FRICTION TRANSMISSION BELT

• US 20140364260A1
• Filed: 08/21/2014
• Published: 12/11/2014
• Est. Priority Date: 02/24/2012
• Status: Active Grant

• Current Assignee: Bando Chemical Industries Limited
• Original Assignee: Bando Chemical Industries Limited
• Inventors: Takahashi, Shinji, Okubo, Takayuki, Tachibana, Hiroyuki, Noguchi, Tadahiko, Takano, Yasuhiro
• Granted Patent: US 9,702,434 B2
• Time in Patent Office: Days
• US Class Current: 474/263
• CPC Class Codes: B29D 29/106 Cogged driving belts
• CPC Class Codes: C08J 5/04 Reinforcing macromolecular compounds with loose or coherent fibrous material
• CPC Class Codes: C08K 7/02 Fibres or whiskers
• CPC Class Codes: C08L 2205/16 Fibres; Fibrils
• CPC Class Codes: C08L 23/16 Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
• CPC Class Codes: C08L 77/00 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 77/10 Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids
• CPC Class Codes: F02B 67/06 driven by means of chains, belts, or like endless members
• CPC Class Codes: F16G 1/10 with textile reinforcement
• CPC Class Codes: F16G 5/08 with textile reinforcement
• CPC Class Codes: F16G 5/20 with a contact surface of special shape, e.g. toothed

Abstract

A friction transmission belt includes short fibers arranged so as to protrude from a surface of a pulley contact-side part made of a rubber composition. The short fibers consist of aramid short fibers and non-aramid synthetic short fibers having a standard moisture regain of equal to or less than 4%.

Claims

1. A friction transmission belt comprising:

short fibers arranged so as to protrude from a surface of a pulley contact-side part made of a rubber composition,

wherein the short fibers consist of aramid short fibers and non-aramid synthetic short fibers having a standard moisture regain of equal to or less than 4%.

2. The friction transmission belt of claim 1, wherein

the non-aramid synthetic short fibers are polyester short fibers.

3. The friction transmission belt of claim 1, wherein

an area occupancy of the short fibers at the surface of the pulley contact-side part is 40 to 99%.

4. The friction transmission belt of claim 1, wherein

an area occupancy of the aramid short fibers at the surface of the pulley contact-side part is 30 to 80%.

5. The friction transmission belt of claim 1, wherein

an area occupancy of the non-aramid synthetic short fibers at the surface of the pulley contact-side part is 15 to 65%.

6. The friction transmission belt of claim 1, wherein

a ratio of the area occupancy of the aramid short fibers at the surface of the pulley contact-side part to the area occupancy of the non-aramid synthetic short fibers at the surface of the pulley contact-side part is 0.1 to 10.

7. The friction transmission belt of claim 1, wherein

the aramid short fibers include para-aramid short fibers and meta-aramid short fibers.

8. The friction transmission belt of claim 1, wherein

the rubber composition forming the pulley contact-side part contains the short fibers.

9. The friction transmission belt of claim 8, wherein

a mixing amount of the short fibers with respect to 100 parts by mass of a rubber component of the rubber composition forming the pulley contact-side part is 10 to 85 parts by mass.

10. The friction transmission belt of claim 8, wherein

a mixing amount of the aramid short fibers with respect to 100 parts by mass of the rubber component of the rubber composition forming the pulley contact-side part is 2 to 25 parts by mass.

11. The friction transmission belt of claim 8, wherein

a mixing amount of the non-aramid synthetic short fibers with respect to 100 parts by mass of the rubber component of the rubber composition forming the pulley contact-side part is 5 to 60 parts by mass.

12. The friction transmission belt of claim 8, wherein

the mixing amount of the aramid short fibers with respect to 100 parts by mass of the rubber component of the rubber composition forming the pulley contact-side part is less than the mixing amount of the non-aramid synthetic short fibers with respect to 100 parts by mass of the rubber component of the rubber composition forming the pulley contact-side part.

13. The friction transmission belt of claim 1, wherein

the rubber composition forming the pulley contact-side part contains a filler.

14. The friction transmission belt of claim 13, wherein

a mixing amount of the filler with respect to 100 parts by mass of the rubber component of the rubber composition forming the pulley contact-side part is 10 to 70 parts by mass.

15. The friction transmission belt of claim 13, wherein

the filler is sheet silicate.